Paper grasp for paper cutting and folding machines



May 2,1933. SCHWARTZ 1,906,638

PAPER GRASP FOR PAPER CUTTING AND FOLDING MACHINES Filed Sept. 8, 1952 2 Sheets-Sheet l jg. 1Q

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PAPER GRASP FOR PAPER CUTTING AND FOLDING MACHINES Filed Sept. 8, 1932 2 Sheets-Sheet 2 Fig.6). F l 2 7g. 6'.

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Patented May 2; 1933 (WILLARD A. SCHWARTZ, or Los ANGELES, cALIFom m This invention relates to a-mechanism for I grasping sheets of paper in paper cuttingand folding machines and particularly zpertains' to a paper'gras'ping appliance for use on one .5 of the revolving paper feed" cylinders of a newspaper cutting and folding machine for holding one or more sheets of paper injplace on the cylinderiduring't'he cutting operation and preparatory to feeding'the paper from the cylinder to afolding device.

' An objectof theinvent1on'1s to provide a paper grasp ofthe' above character which is so formed and operated asto obviate perfora tion" and consequent mutilation-of the paper 15. sheet as occurs-tin the types'of 'paper grabs 1 nowgenerally inuseinmachines forielding news prints and the like; e

f Anotherob ec't sto provide a paper grasp which includesfan arrangement of clamps .20 carried on'fa revoluble-paper conveying cylinbe moved inand' out'of der and adapted to clamping engagement with; themarginal portions of sheets ofpaper on the cylinder,'-and to provide mechanism for actuating the clamps and to time their engagement with,

and disengagement from the paper-sheets at predetermined poi ts in theperipherial travel of thecylinder: T I

, Anotherob ect is to provide a 'construction whereby the clamps are adaptedto-ioperate withrelation to-either one 'layerotpaper or-a plurality of layers carried onthe pafper con-f veying cylinder; and to provide a means' in such construction for enabling ready manual ;3 'adjustnient of. the clampsto; accommodate them to-ivarious operating conditions."

.fAnotherobjectis to'provideapaperclampe p 7 oluble paper convey ng 'cylindersof a newsing mechanism of the above character which is simple in construct on, efiicient n ts opera= 4o tion, and adapted to .bezactuated at highspeed.

KVith the foregoing: objects in View. together with such'other objects and advantages as may subsequently ,appear, fthe invention, re-

sides in the parts and in the combinatiomconi struction and arrangement of parts hereini the direction indicate'db th r o 8,1932. Serial No. 632,134..- j

after des'cribedand claimed, andillustrated .by way ofexamplelin the accompanying drawings in which: I 1 Fig. 1 is a view in longitudinal section of a paper conveying cylinder, showing the inven .tion as applied; parts'being broken away T and portions being shown in elevation Fig. 2is'a view in vertical section and 'ele; vation as seenon the line 2-2: of Fig. 1' in v Fig. 3 is a detail in horizontal section taken f on'the line 3-3 of Fig. 1; p J

Fig. '3 is a detail in cross'section viewed on the line 3 3";of Fig. 3 in'thedirection indicated by the arrow; .7 v

p 1 Fig. 4 is agdetail in section taken onf line 4.-4 of Fig. 2illustrating the cam contour; 'Figs. 5, 6; 7 and'8 are diagrams in'section and elevation illustrating the mode of opera tionofthe' invention; Fig. 5 showing the parts as disposed in their normalposition'in readiness for operation; Fig. 6 showing the clamp-as advanced in readinessto be actuated to engage the paper; Fig. showing the clamp as disposed in engagement with the 7 paper; and 8 showing the parts in an i intermediate "position with the'clamp as initially freed from the pa per; I

fFig. 9 i's a detail lanviewof the'paper cla'inpas seen on the line 99 of Fig. 7

Fig. 10 .is a, detail in cross'section taken on the'1ine.10+'-10 of Fig. 9; andv i Fig. 11 is a View inverti'c'eilsecti'ontaken onthe line 11%}11 of Fig; 8,1showing'fthe n anually operated 'clamp' adjustment."

Referring'f'tothe drawingsmorespeci'fically,-"A indicates generally one of the'rev paper cutting. and folding machine, which cylinder is'mounted on a shaft Bsupported in frame. members C and D and which shaft is driven'in the usual manner to e flect .ro- ,tation of the cylinder A. I

The cylinder A embodies a-peripherial wall portion li around which one or more layers of sheets of paper are adapted to be passed and includes end walls 15 and 16 fitted with hubs 17 and ,18 affixed to the shaft B. The wall 14 is formed adjacent each end of the cylinder with diametrically opposed pairs of slots, indicated at 19, in each of which slots is mounted a slide block 20 adapted to be shifted longitudinallyof the cylinder; the slide blocks being formed with longitudinal channels 21 and 22 on opposite sides thereof, as shown in Fig. 10, which channels are engaged keys 23 and 24 demountably supported in longitudinal channels 25 and 26 formed in the side walls of the slots 19. The keys 23 and 24 are inserted into the channels 2l25 and 22-26 through openings 27 and 28 in the end Walls of the cylinder, as shown sza Mounted on each of the slide blocks is a clamp 30 one end ofwhich is monnted ,ona pivotpin 3lcarried on the outer end of the slide block so that the clamp may swing in-' wardly and outwardly relative to the outer periphery ofthe cylinder; the several clamps eing arranged with their outer free ends extending inwardly fro'n'x the ends of the cylinder so as to projecttoward the margins of a sheet or sheetsof paper I! disposed on the cylinder. Pivotally secured at 32 to the under side of each of the clamps 30. is a rod 33 which passes through an. opening 34 in the slide, block 20 and leads .interiorly of the cylinder,and conne'cting'with each of the rods 33 is a pair of spaced arms 34 and each arm 34 being connected apivot pin 36 totherod 33 intermed ate the ends of the latter and each arm .35 being connected by a pivot pin'37 to the end ofthe rod 33'oppo-' S te th P t 6- i M p The arms34 extend through and are slidahly supported for longitudinal and pivotal movement iii openings 38 in the end walls of the cylinder, and carried on the outer ends of the arms 34 are rollers 39 arranged to traverse the surfaces of fixed cams 40 carried by the frames Cs and D, The arms 35 extend through slots 41 in the cylinder end walls, and fitted on the outer ends of the arms 35 are rollers 42 arranged to traverse cam grooves '43 formed on plates E fixed on the frames C and D. Each arm 35 is fitted intermediate its ends with a pivot pin 44 the pivot. 32 in spaced relation to the ends of which .pinsprotrude from opposite sidesv of thearms 35 and extend into elongated slots 45 in slide blocks 46 c arried by guides 47 on the inner faces of the cylinder end walls, as shown in Fig. 3. A pair of springs 48 and 49 carried by each of the slide blocks 46 bear on opposite edges of the arms 35 diametrically opposite the axes-of the pins 44 so to yieldably oppose movement of the pins 44 longitudinally of the slots 45 in either The slide blocks 46 are affixed on stems 50 extending radially of the cylinder along the inner sides of the end walls of the latter; the outer ends of which stems are formed with screw threads 51 screwed into engagement with turnable sleeves 52 extending through the peripherial wall 14 of the cylinder. The sleeves are held against longitudinal movement by end flanges 53 countersunk in the outer face of the wall 14 and collars 54 screwed on the sleeves 52 to slidably bear against the inner face of the wall lgl. The outer ends of thejsleeves 52 are formed with straight sided sockets 55 for the reception of a tool whereby the sleeves may be rotated to effect longitudinal adjustment of the stems 50.

Connecting with the rods 33 intermediate the pivotal connections thereof with the clamps 30 and arms 34 are springs 56 attached to the cylinder end walls, and which springs exert a pull on the arms tonermally maintain the slide blocks 2O in their retracted positions; ,thesprings 56 opposing movement of the rods 33 under action of the arms 34 and cams 40. i

Connecting with the arms 35 adjacent the pivots 37 are springs whichextend and are se cured to the inner face of the cylinder wall 14, which spriiigs eyieldably oppose 1 as not to affect the springs 48, in other words,

the springs 48 are of such stiffness and tension as to oppose movement of the arms 35 and pivot pins 44 under the urge of the Thecylinder A is formed withhand holes, (not shown). in the usual mannerto afford access to the interior thereof for purposes of assemblage-of the parts therein.

,The cams 40-are each provided with a'hump 58arranged to act on the arms 34 as the 'oylinder A revolves at a predeterminedpoint in the peripherial travel of the cylinder, 'to shift the arms longitudinally and thereby effect lateral movementof the rods 33 in opposition to the springs 56 and to advance the slide blocks 20, and each of the cam grooves 43 is contoured, as shown in Fig. 2, with a concentric portion a extending approximately loo - Fig. 6 in opposition tothe springs 56; Im-

, tained in clamping engagement with the strip p U then adjusted manually throughthe medium of the sleeves ,52 to shift the positionsof the ever, since the clamps-30 are then engaged on layers of paper is fed to theperiphery thereof .in .the usual manner the strip being fed tot-the gperipherial portion of theroller :at a point where-the clamps30-areopen and retracted in ainormall position, shown, in

tainedl whilejthe rollers 42onnthe arms-35 are traversing :the concentric length alofithe camigroov'e's 43, and'duringwhichtime rollers 39 and arms 34 are traversing the dwell 7 portion of the cam40 on opposite sides of the hump 58.. The strip F is of such width that the edges thereof adj acent the point of meeting of the strip with the periphery ofthe cylinder will lie close to' but spaced from the open aligned pair of the clamps 30, as shown inFig.5. v The first operation'is to cause the aligned open pair of clamps 30 on one side of the. cylinder to advance over opposed marginal portions of the strip of paper, as shown in Fig. 6. This is accomplished bytheaction of the humps 58 on the cams 40 which, as,

the cylinder A revolves, causes the arms 34,

rods 33 and slide blocks 20 carrying the clamps 30 to advance to the position shown in V mediately after the slide blocks 20 with their associated clamps 30 being disposed in their.

advanced position the'rollers 42 on the arms 35 ride upwardly inthe inclined portions 0 of the cam grooves "43'thereby rocking'the levers 35 so as to exert a downward pull on the rods 33 thereby moving the clamps 30 into engagement with the strip of paperiF, as shown in Fig. 7'; the clamps being mainthroughout substantially a one -half revolution of the cylinder A by'reason of the rollers 42 on the levers 35 then traversing the con I i .Whil eI'have shown and described a specifics, embodimentof the invention, I do not limit myself to the exact details of construction centric portions 1) of the carngrooves 43.-

, Shortly after the clamps 30 have been caused to engage the strip thegrollers 39 on the arms 34 clear the humps 58 so as to permit a the sprin s 56 to exert a pull on the rods 33 tending to retract the slide blocks 20. Howw'ith'the marginal portions of the stripF, the

' side blocks 20 will move only such distance under the urge of the springs 56 as will take up any slack transversely of the strip F. v The 56 will thus serve to stretch and hold"; metgficanyioppo-sgd pains of papermdampsp r p er Qfi inder rr siw vJ the clamps, ofeach'pair disposed adjacentthe f where the rollers 42 on the arms 35, just 1 8- ;snd it ecylin ingtowa gd h;

ferred to, pass from the sections 6 of the cam rrooves downwardly through the inclined springs the strip F flat on theperiphery of the cyl inder.

When the'cylinder has rotated toa point* portions'd theiclamps 30 will, on the'rollers j 42- initially moving vinwardly onthe inclined Y portions d,efiect, outward movement of the i .the humps ,58 on thenext operation. parts will'thenbe disposed as shown Fig.

f Fig. 5,.in which position the clamps aremains :Ofjthe appended i claims clamps?30, sufiicientlyto relieve their grip on the strip F whereuponthe springs 56 will rearms 34in position to beagain actuatedbyi e 8. on the rollers; 42 entering the portions ga ofithe cam groove/s43, the clamps ,30will be fully opened andithe parts restored .to their.

iness for/another operation;

to the folding mechanism'inthe usualnianner, and. not necessary tobehere shown; since such cutting and folding mechanism constitutes no rpart'of the present invention.

In ;ev,en ,of vari tion f thickness o f the strip F such will be compensated for reason of the provision of the floating fulcrums or a pivot pins 44 ofthe arms '35, since the springs 5 =normalposition, asshown in inread- 1 48 and .49 will yieldtdpermitthe pivotip ns I c44to shift to whatever position may be neces-- ,sary according to thelimit of inward move; -m e lamp 3 T d w' "t s 4 adapted to-automatically. accommodate itself toclamping\difierentthicknesses of-paperon the-cylinder,within-ilimitshut vwhere necessary to adapt the clamps to operate on",

a moreorless thickness-oi. the strip they; are

ivotipins of thg levers 35 as'before'described;

l n a r n me sh w b t m yu pley .suchchange s and modifications mas parts and their arrangements, as occasion may .re- ,quire comi with nthe meanlngand scopev j 1.. In a 120 on said cylindenand spring means for exertagape ased s am s he ei d'wim 1 

